Spraying-nozzle.



J. W. POTTER.

SPRAYING NOZZLE.

APPLIGATION FILED 113.19, 191s.

1,073,438, Patented Sept. 16, 1913.

55 s 57 n d, n

[72 van or Mz'fnesses n ya@ 'narran sTATEs OFFICE.

JOHN W. POTTER, OF CRANSTON, RHODE ISLAND, ASSIGNOR T0 ALBERT J. DRONSFIELD, OF PROVIDENCE, RHODE ISLAND.

SPRAYING-NOZZLE.

Appucanon filed February 19, 1913. serial no. 749,560.

To all iolumw't may concern.' Y

Be it known-that I. JOHN lV. Porras, a citizen of the United States, rcsidingat Cranston, in the county of Providence and State of Rhode island, have invented certain new and useful v)mprm'ements 1 n Spraying-Nozzles, of which the following 1s a speci tication.

My invention relates to nozzles adapted for use in humi'difyers, oil burners and other such structunes wherein a liquid is sought to be atomized by virtue of an induction by air or steam through the nozzle.

The objects of my invention fire essentiallv to insure a more perfect atomlzat-lon than has heretofore. been obtained; to procure this end without the presence of any drip at the nozzle; to increase the degree of atomization: and to 'attain these ends in a simple and inexpensive manner.

A further object is to provide means for regulating the volume of water 'or air fed to the nozzle during its operation.

To the above ends my invention consistsv in such parts and combination of parts as fall within the scope of the appended claims. In the accompanying drawings which form a part of this specification, Figure 1 is a sidevelevation of a nozzle embodying my ir1=.-entio-n. Fig. A2. a section of the same on line aan of Fig. 1. Fig. an enlarged section of the portion of the nozzle head, and Fig. 4. a section on liner/y of Fig. 2.

ILike reference characters indicate like parts throughout the views.

My nozzle in its present and preferred form of embodiment comprises a hollow c vlindrical body 1 providedwith a restricted or bearing portion 2 of less internal diameter than the/ diameter of the remainder of the body, the interior of said body being provided with screwthreads 4. The body i s provided with an vintegral stem 5 provided with an axial passage 6 and external screw threads 7.` Fixed inthe bearing-2 of the body as a forced fit is an intermediate portion of an arbor 8. An intermediate portion 9 of the arbor is in the bearing` 2 and' is proclined peripheral grooves Aor channels 14. Forward of the enlargement '13 the arbor 8 is tapering or inwardly inclined as vat 15. The arbor is hollow throughout its length and has slidably mounted in its open central portion a liquid tube li. whoseforward portion 17 is contracted and terminates in a restricted central passage in its forward end 18. The axial opening of the arbor is somewhat enlarged at its forward portion forming an annular bevel 19. which combined with the tai'iering face 15 of the arbor forms an annular nose 20 il-shaped in cross section. 'lhc arbor 8 is provided in the rear of the portion i) with external threads 22 upon which is .mounted a knul-led nut 24 provided with internal threads 25 engaging the threads 22 of the arbor, and provided with an inturned annular shoulder 26 upon its outer end. soldered or otherwise fixed to the liquid tube 16 is a bushing 27 provided at one end with an annular iiange 28 abutting against the `fiange 26 within the nut 24. Fixed upon the bushing 27 adjacent the nut 24 is a second nut 30 provided with external threads 31 engaging internal threads 32 upon a coupling nut 33 whose fiange 34 engages the head'35 of thc liquid pipe'36. The head 35 of the pipe 36 is curved and iits within a cavity in the end of the nut 30. The supply pipe 36 leads from any convenient source of liquid supply. Mounted within the sleeve or body 1 around the forward portion of the arbor andspaced from the `latter is an adjacent sleeve 38 provided upon the exterior of its inner end with screw threads 39 engaging the threads 4 of thev body, and provided at a short distance from its forward end with a conical shoulder L10.immediately forward lof which the sleeve is provided with a nearly hemispherical annular cavity'41 forming at the forward extremityl of. the sleeve an inwardly directed curved flange 43 surrounding a restricted orifice 44 in front of the restricted portion 17 of the liquid pipe and the nose 20. It will be noted that the conical surface 15 of the nose and thesurface of the shoulder 40 are spaced apart as best shown at 46 in Fig. 4.

Patent ed Sept. 16, 1 9,13.

lo and out ofthe opening 18 ata pointwithiu the chan'iber 50 :formed-by the cavity 4 1 in the sleeve. llns chamber 50 1s an antiexpansion chamber. '.lhe liquid is induced' i. through the tubes 3G and lt by the operating air or fluid passing under pressure through the opening t in the stein 5 of the hodv l.'\vhich opening extends into the chaiuber or annular passage Sil Within the o hotly l intei'mediate the shoulder 10 and the inner end ol' the sleeve 3S. and passes thence through the annular space 53 between the .sleeve 3S and the arbor. and thence through the grooves orchannels ll in the enlarge- 5 ment '13. and thence through the annular converging opening -tt and thence into and through the antiexpansion chamber 5t) in a manner to he forthwith described in more detail. The course of the air or tiuid as it emerges t'rom the opening 46 is graphically lindicated in Fig. 3 h v the two sets ot interlset-ling lines 55 and 3(3, whose points ol' intersection are located exterior of the end ol' tht` sleeve as at 5T. 'l'he broken lines 55 5 and ott indicati` the conical character of the emerging an or 'luid stream, which forms a resultant conical shaped vacuum area 58, which vacuum is the lneans of inducingr the discharge of the liquid from the ctmtracted portion or nozzle l'1T ot the water pipe 16. llxperiments have disclosed the fact that the greater the area ot thel vacuum the greater will be the force of liquid discharge. and the greater the resultant atoinization otthe liquid. Experiment has further shown that a discharge of the air or fluid from' the @annular opening 4-(3, unrestrained in any manner, results in an undue dispersion of the emerging fluid, in such a manner as to 0 prevent the formation of any substantial resultant vacuum. It was -found however that the provision of an antiexpansion chamber bounded by a contracted flanged portion 13 serves to house the adjacent air 5 and forms a back pressure exterior of the cone 55, 56 that overcomes the undue dispersion of the fluid forming the cone. The passage of the air through the grooves' 14 causes a resultant. rapidly rotating air cone, which at. the points 57 of convergence pulverivies the liquid which issues iu the `forni'V of fog. 'lhe volume otl liquid is regulated by manually turning the knurled nut 34- upon the arbor S. lhe volume of operating lluid is regulated by manually rotating the linurled portion 4S ot the steeve 38, thereby controlling the extent of the opening Alt. '.lhe enlargement ol the opening i-tt hy moving the sleeve 3S and its shoulder 1t() increases. by virtue of the incr iased volume of fluid, they volume of liquid drawn through the tube 16. Longitudinal adjustment of the portion 17 ot the tube 1G by the nut .24 insures the proper degree of pulverization under the changed conditions attendant. upon the change in the volume of fluid.

What I claim is:-

ln a spraying nozzle, the eoml'vination with a hollow body, of a sleeve, rotatably mounted in the body and provided with an antiexpansion chamber in one end, a hollow arbor fixed in the body and extending concentrically to the sleeve and spaced from the. sleeve, an annular enlargement upon the arbor engaging the sleeve and provided with inclined peripheral grooves, a liquid tube slidably mounted in the arbor and provided with a. contracted end portion extending beyond the end ot' the arbor and concentric therewith. a nut upon the intermediate portion of the arbor, a bushing llxed to the liquid tube provided With an annular shoulder engaging the nut., a second nut fixed to the bushing and provided with a cavity in one end. a liquid supply pipe. a curved head upon the liquid supply pipe engaging in the cavity in the nut. and a.

coupling nut upon the last mentioned nut engaging the head of the supply pipe.

In testimony Whereofl have aiiixed my signature in presence otwo witnesses.

. y JOHN W. POTTER.

Witnesses t WiLLIAM H. OCONNon, ELMER C. HORNE. 

